Lets change the support and programme on TV to Cricket and Cricket Worldcup.

Now I and my siblings do not play cricket but are die hard fan of game. If our school is playing cricket world-cup, we will ditch movie and watch and go the world-cup.

So why it is assumed that all the people who play soccer will watch the match, and others will watch movie. I know the probability we are talking is Theoretical, not Empirical. But still in theory, I can say there would be people watching match, and some players will watch movie instead.

In math, we usually make assumptions to simplify calculations. In theory, we could expand and consider other situations like the one you mentioned. Hope that helps @tbhaxor .

This is what instructor shared. So I want to understand more about why we do the calculations in maths that could deviate from real-world (empirical probability).